Jackett steps down from Millwall
Millwall manager Kenny Jackett has resigned from his post to pursue a "new challenge".
The 51-year-old moved to the New Den after leaving Swansea in March 2007 and led the club into the Championship via the League One play-offs in 2010.
The London club also made the semi-finals of the FA Cup this season, but were defeated at Wembley by Premier League outfit Wigan.
A statement from Jackett read: "After almost six seasons I personally feel the time is right for a new challenge, and also for a new manager to come into Millwall with fresh ideas, to take the club forward towards its long term goal of reaching the Premier League.
"I would like to thank the chairman, the board of directors, players, members of staff and supporters of Millwall for their considerable backing.
"I have thoroughly enjoyed my time at Millwall. My family and I will always have a strong link and affinity with the club."
Millwall finished ninth in their first season back in the Championship, but have slipped into the bottom half in the previous two campaigns and only secured their place in the second tier on the final day of the term, after losing four of their last five games.
Chairman John Berylson added: "On behalf of the Board of Millwall Football Club, I want to express my thanks to Kenny for his fantastic service and achievements over the past five and a half years.
"He has played a major role in creating a stable environment at Millwall which hadn’t been the case prior to his arrival.
"On a personal level, whilst respecting Kenny’s decision, I wish I could have persuaded him to change his mind. He was my first acquisition as chairman of the club and has proved himself to be one of the best. I am losing a great manager, but he will remain a good friend and hopefully, golf partner.
"I know everyone associated with Millwall, management, staff, players and fans, will wish Kenny all the very best with his future endeavours, except for those times when he might oppose us on the pitch.
"We are now determined to move the club forward and build on the foundations Kenny has provided towards even greater success."